[BUG] Storyline indexer missing genesis plot + StorylineCreated ABI incomplete

[realproject7]

Bug Description

Two related issues found during code review of PRs #45-#50:

1. StorylineCreated event ABI missing fields (lib/contracts/abi.ts)

The StorylineCreated event is missing openingCID and openingHash fields. Per proposal §4.1, createStoryline() emits these so the indexer can fetch and verify the genesis plot content.

Current:

export const storylineCreatedEvent = {
  inputs: [
    { name: "storylineId", type: "uint256", indexed: true },
    { name: "writer", type: "address", indexed: true },
    { name: "tokenAddress", type: "address", indexed: false },
    { name: "title", type: "string", indexed: false },
    { name: "hasDeadline", type: "bool", indexed: false },
  ],
} as const;

Expected — add these two fields:

{ name: "openingCID", type: "string", indexed: false },
{ name: "openingHash", type: "bytes32", indexed: false },

2. Storyline indexer does not store genesis plot (src/app/api/index/storyline/route.ts)

The storyline indexer creates a storylines row with plot_count: 1 but never inserts a row into the plots table for the opening chapter (plot_index = 0). This means readers cannot see the genesis plot.

Fix: After creating the storyline record, the indexer must:

1. Read openingCID and openingHash from the decoded event (requires ABI fix above)
2. Fetch content from IPFS via https://<bucket>.s3.filebase.com/plotlink/<openingCID>
3. Fall back to request body content field if IPFS fetch fails
4. Verify keccak256(toHex(content)) === openingHash
5. Insert into plots table with plot_index: 0, storyline_id, writer_address, content, content_cid: openingCID, content_hash: openingHash

Reference the existing plot indexer (src/app/api/index/plot/route.ts) for the IPFS fetch + hash verify + Supabase upsert pattern.

3. createStoryline function ABI may also need openingCID and openingHash params

Check lib/contracts/abi.ts — if the createStoryline function ABI is also missing these input params, add them to match proposal §4.1.

Acceptance Criteria

• storylineCreatedEvent in lib/contracts/abi.ts includes openingCID (string) and openingHash (bytes32)
• createStoryline function ABI in lib/contracts/abi.ts includes openingCID and openingHash params if missing
• Storyline indexer inserts a plots row for the genesis plot (plot_index = 0)
• Genesis plot content is fetched from IPFS, verified against hash, stored in content column
• Falls back to request body if IPFS fetch fails (same pattern as plot indexer)
• npm run lint and npm run typecheck pass